Blog — Andrew Healey

Hey 👋, I'm Andrew. I'm a software engineer and I enjoy teaching people about code! Get an update when something new comes out by signing up to my newsletter.

Boids in WebAssembly Using Go

July 26, 2020 — Go

The famous flocking simulation built with the Ebiten game library.

Creating Randomness Without Math.random

July 12, 2020 — Javascript

Building a replacement for JavaScript's random number generator.

A Practical Introduction to Graphs (Network Diagrams)

July 05, 2020 — Python

Calculating the path between two countries with the least border crossings.

Polyfilling the Fetch API for Old Browsers and Node.js

June 25, 2020 — Javascript

A quick look at polyfilling, along with with solutions for both environments.

The Flow of Knowledge in a Team (or Why I Dig Tickets)

May 31, 2020 — Career

Engineering tickets often end up meaning a lot. For the product but also emotionally for the individual.

Adding Comments to Gatsby with Netlify Serverless Functions + GitHub

May 08, 2020 — Javascript

Use Netlify serverless functions to let users add comments to a static website.

Hacking Together an E-ink Dashboard

April 28, 2020 — Python

A prototype Raspberry Pi dashboard to save me talking to my smart assistant.

How I'm Working Remotely

April 26, 2020 — Career

Writing code, working (almost) solo, and exploring remote-life during the UK lockdown.

Twitter Ticker Tape with a POS58 Receipt Printer

April 10, 2020 — Python

Building a fun toy with my Raspberry Pi, Python, and Tweepy.

Book Review: The Developer's Guide to Content Creation

March 08, 2020 — Career

Discussing an amazing resource for those writing for developers.

DEV Article Analysis

January 19, 2020 — Javascript

Building a tool for users to analyze their work over time.

Gatsby Sparks Joy

January 11, 2020 — Javascript

Migrating from Jekyll to Gatsby.

Hardest JavaScript Puzzle I've Ever Solved

November 17, 2019 — Javascript, Fun

Writing JavaScript with a one character width restriction.

Let's Build a CAPTCHA Generator with Node.js

November 11, 2019 — Javascript

Using Canvas, Express, and a GitHub Action.

Cloning Memcached with Go

October 21, 2019 — Go

I'm really starting to enjoy Go.

My First Golang Program

October 02, 2019 — Go

Conway's Game of Life in Ebiten.

I Built a Bot to Try and Get Money Back From My Internet Provider

August 22, 2019 — Python

My most popular project yet!

My Experience with Pair Programming

August 13, 2019 — Career

Pairing for fun and profit.

An Introduction to Caching on the Web, With Examples in Python

July 07, 2019 — Python

A high-level overview of caching.

What If I Want My Website to Last for 100 Years?

June 24, 2019 — Fun

Prepping for the internet to happen.

A Tutorial on Tricking Google: Encoding Messages in Apostrophes

June 18, 2019 — Python

Using character codes to hide in plain sight.

Your First Open-Source Pull Request: a Walkthrough

June 16, 2019 — Career

Making a small change to the Jekyll project.

Refactoring JavaScript for Performance and Readability (with Examples!)

June 11, 2019 — Javascript

A few tips that have really helped me.

Saving Data in JavaScript Without a Database

June 03, 2019 — Javascript

The title is a lie I also show how to use SQLite.

Interview Question: Implement a Progress Bar

May 27, 2019 — Javascript

Different ways to do one thing well.

Solving Puzzles With High-Performance JavaScript

May 19, 2019 — Javascript

It's fast but is it worth it?

A Tiny Project, From Inception to Deployment

May 12, 2019 — Javascript

A JavaScript webscraper for MDN.

Continuous Deployment to Glitch via GitHub Webhooks

May 06, 2019 — Javascript

Joining two of my favorite ecosystems together.

Fun With Linear Time: My Favorite Algorithm

April 30, 2019 — Algorithms

Breaking down the Boyer–Moore majority vote algorithm with examples in Python.

What They Don't Teach You at a Computer Science Masters

April 24, 2019 — Career

Bubblesort isn't everything.

The Weird Rules I Set Myself That Got Me a Job

April 18, 2019 — Career

Advice that I haven't seen elsewhere.

How to Write an Awesome GitHub README

April 14, 2019 — Career

Attract and educate.

Talking to Python from JavaScript (and Back Again!)

April 11, 2019 — Python, Javascript

Let's learn how to pass data back and forth between languages.

Learn the Storage API by Building a Note Taking App (Tutorial)

April 09, 2019 — Javascript

Learning and building.

Embed Your Latest DEV Posts Anywhere (Tutorial)

April 06, 2019 — Javascript

Using the DEV.to API with Node.

Build a Python Bot to Find Your Website's Dead Links (Tutorial)

April 02, 2019 — Python

Crawling a website for missing resources using the Python standard library.

Answered: What the Heck is Code Golf?

March 30, 2019 — Fun

I love code golf and you should too!

JavaScript One-Liners That Make Me Excited

March 28, 2019 — Javascript, Fun

Dust off your ternary expressions, we're going in.

Need a Friend? Write a Reddit Bot with Python to Follow You Around (Tutorial)

March 25, 2019 — Python

The basics of building a Reddit bot that listens for phrases and replies to them.

Earn a Build Passing Badge on GitHub! Testing Your Express App with Travis CI (Tutorial)

March 22, 2019 — Javascript

How to setup Travis CI for a Node/Express project.

Coding a Live Cam for the Raspberry Pi in Python (Tutorial)

March 18, 2019 — Python

A lo-fi solution for streaming images from your Raspberry Pi to the web.

How Flappy Bird Got Me My Start in Software

March 15, 2019 — Career

An overview of how I learned to code. Also a bit on my experience during my CS Masters.

A Day in the Life of a Mediumly Productive Software Engineer

March 14, 2019 — Career

Living, working, building, and drinking too much coffee.

Kicking Butt and Taking Names With WebSockets (Tutorial)

March 13, 2019 — Javascript

A little on the history of WebSockets and a brief overview on how to use them in JavaScript.

Two Things About My First In-house Software Job That I Didn't See Coming

March 12, 2019 — Career

On enjoying being part of a team.

Creating Cute GitHub Badges Based Off a Project's Mood (Node.js)

March 11, 2019 — Javascript

Creating GitHub badges based off the time when most people contribute to a GitHub project.

Real-Time Streaming of Every Emoji Posted as a Comment to Reddit.com

March 04, 2019 — Javascript

Building a website which live streams every emoji posted to Reddit.com.

I Ported Sudoku to Your URL Bar and It Plays like a Dream

February 21, 2019 — Javascript

Goofy project in which you can play Sudoku entirely within your URL bar.

Cloning Dominos Order Tracker as a Microservice with Node.js and Firebase!

February 20, 2019 — Javascript

Writing an order tracker with Node, Express, and Firebase.

Benchmarking WebSocket Servers with Python!

January 28, 2019 — Python

Benchmarking websocket servers and frameworks with async Python.

Leetcode - Episode 17 - Moving, Shaking, and Folding (3 x E)

January 21, 2019 — Algorithms

Solutions for: Move Zeroes, Merge Two Sorted Lists, and Merge Two Binary Trees.

Leetcode - Episode 16 - Pretty Efficient (3 x E)

January 16, 2019 — Algorithms

Solutions for: Flipping an Image, Leaf-Similar Trees, and Maximum Depth of N-ary Tree.

Leetcode - Episode 15 - Three Tree Qs (3 x E)

January 15, 2019 — Algorithms

Solutions for: Invert Binary Tree, N-ary Tree Postorder Traversal, and N-ary Tree Preorder Traversal.

Leetcode - Episode 14 - Short, Easy Solutions (3 x E)

January 14, 2019 — Algorithms

Solutions for: Monotonic Array, Max Consecutive Ones, and Contains Duplicate.

Leetcode - Episode 13 - Finding My Stride (3 x M)

January 13, 2019 — Algorithms

Solutions for: Range Sum of BST, Max Increase to Keep City Skyline, and Custom Sort String.

Leetcode - Episode 12 - Starting Early (3 x E)

January 12, 2019 — Algorithms

Solutions for: Verifying an Alien Dictionary, Reverse Only Letters, and Backspace String Compare.

Leetcode - Episode 11 - Faster than 99.17% (1 x M, 2 x E)

January 11, 2019 — Algorithms

Solutions for: Reverse Vowels of a String, Isomorphic Strings, and Reverse Words in a String.

Leetcode - Episode 10 - Short Solutions (1 x M, 2 x E)

January 10, 2019 — Algorithms

Solutions for: Single Number II, Fibonacci Number, and Ransom Note.

Leetcode - Episode 9 - Trudging Through (3x E)

January 09, 2019 — Algorithms

Solutions for: Majority Element, Detect Capital, and Not Boring Movies.

Leetcode - Episode 8 - Breaking Out Some Mediums (3x M, 1x E)

January 08, 2019 — Algorithms

Solutions for: Encode and Decode TinyURL, Insert into a Binary Search Tree, Minimum Add to Make Parentheses Valid, and Goat Latin.

Leetcode - Episode 7 - Getting More Pythonic (3x E)

January 07, 2019 — Algorithms

Solutions for: Two Sum, Valid Anagram, and Length of Last Word.

Leetcode - Episode 6 - Progressively Harder (3x E)

January 06, 2019 — Algorithms

Solutions for: Keyboard Row, Reorder Log Files, and Single Number.

Leetcode - Episode 5 - Fastest Solutions Yet (3x E)

January 05, 2019 — Algorithms

Solutions for: Uncommon Words from Two Sentences, Search in a Binary Search Tree, and Fizz Buzz.

Leetcode - Episode 4 - gnivloS melborP (3x E)

January 04, 2019 — Algorithms

Solutions for: Reverse Words in a String III, Sort Array By Parity II, and Reverse String.

Leetcode - Episode 3 - The Streak Continues (3x E)

January 03, 2019 — Algorithms

Solutions for: Sort Array By Parity, Robot Return to Origin, and Self Dividing Numbers.

Leetcode - Episode 2 - Three More Easys

January 02, 2019 — Algorithms

Solutions for: N-Repeated Element in Size 2N Array, Univalued Binary Tree, and Unique Morse Code Words.

Leetcode - Episode 1 - Three Easys

January 01, 2019 — Algorithms

Episode one of tacking Leetcode problems and discussing solutions. Jewels and Stones, Unique Email Addresses, and To Lower Case.